Tool for drawing timing diagrams

Recently I am working with a hardware design group developing an ASIC. And I am drawing a lot of timing diagrams for which I am using Microsoft Excel, as it is easy to import into Word document. But, things are getting more and more difficult with Excel.

What can be used to draw timing diagrams? Is there any easy tool out there?

I have the same problem and tried the following tools:

• drawtiming
• timing (LaTeX)
• tikz-timing (LaTeX)
• Microsoft Visio

After trying all these I now ended up using Visio and pen&pencil. All other programs lacked support for adding arrows/relationships between signals easily. In Visio, such things are absolutely easy. And you can export the diagrams directly to PowerPoint or even as PDF for using them in LaTeX.